北京林业大学学报2017，Vol.39Issue(4)：21-28,8.DOI:10.13332/j.1000-1522.20160106
原始云冷杉、红松林树木生长对氮沉降的响应
Response of tree growth to nitrogen deposition in spruce-fir-Korean pine virgin forest in Lesser Khingan Mountains in northeastern China
摘要
Abstract
In this article, through field control experiment, four gradient nitrogen treatments were set as control (CK, no nitrogen (N), low-N (TL, 5 g/(m2·year)), medium-N (TM,10 g/(m2·year)) and high-N (TH, 15 g/(m2·year)), in order to study the responses of DBH growth of main species to the increasing nitrogen deposition in spruce-fir-Korean pine virgin forest. The results showed that, with the increase of nitrogen adding gradient, the DBH growth of Betula costata appeared a trend of promoting first and then suppression. The DBH growth of Abies nephrolepis and Korean pine would be suppressed due to the increase of nitrogen adding gradient, and long-term nitrogen adding can lead to the degradation or death of A. nephrolepis. While Acer ukurunduense appeared more complex response, which was possibly related to the different response mechanism of this species to the varied nitrogen adding gradients. Meanwhile, it was also found that there existed a certain relationship between the amount of DBH and DBH growth, which was possibly related to tree age and its situated niche. Our study showed that nitrogen deposition could change the growth rate and mortality of trees, and then influence the aboveground ecosystem carbon pool and the carbon cycle of whole ecosystem.关键词
原始云冷杉红松林/树木生长/氮沉降/响应Key words
spruce-fir-Korean pine virgin forest/tree growth/nitrogen deposition/response分类
农业科技引用本文复制引用
王建宇,王庆贵,闫国永,姜思领,刘博奇,邢亚娟..原始云冷杉、红松林树木生长对氮沉降的响应[J].北京林业大学学报,2017,39(4):21-28,8.基金项目
黑龙江省自然科学基金重点项目(ZD201406)、国家自然科学基金项目(41575137、31370494、31170421、31070406)、科技部基础性工作专项A类项目(2014FY110600). （ZD201406）
